Welcome to the Australian Ford Forums forum.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and inserts advertising. By joining our free community you will have access to post topics, communicate privately with other members, respond to polls, upload content and access many other special features without post based advertising banners. Registration is simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact us.

Please Note: All new registrations go through a manual approval queue to keep spammers out. This is checked twice each day so there will be a delay before your registration is activated.

Go Back   Australian Ford Forums > General Topics > The Pub

The Pub For General Automotive Related Talk

Reply
 
Thread Tools Display Modes
Old 21-03-2006, 10:04 PM   #1
capa xr8
Starter Motor
 
Join Date: Mar 2006
Posts: 21
Default underdrive pulleys

has anyone tried the underdrive pulleys are they worth the money do they give you more power

capa xr8 is offline   Reply With Quote Multi-Quote with this Post
Old 21-03-2006, 10:40 PM   #2
Redrum
Force Fed Fords
 
Redrum's Avatar
 
Join Date: Nov 2005
Location: Victoria
Posts: 5,556
Default

The V8 technical section on this forum did have a thread relating to under drives but last time I looked, I couldn't find it. Best to speak to sponsors who supply them.
__________________
2021 Focus ST-3 Mountune Enhanced
Redrum is offline   Reply With Quote Multi-Quote with this Post
Old 22-03-2006, 12:07 AM   #3
superpursuit83
KITTY Crew Member
 
superpursuit83's Avatar
 
Join Date: Sep 2005
Location: WA
Posts: 5,267
Default

Have a look at this thread Underdrives discussion

Underdrives basicaly let more power go to wheels, Less weight to spin etc. Thats how I understand it anyway.

John
__________________
FOR SALE

BAII Super Pursuit 0083

Awsome power by XTREME FORD TUNING 500rwkw New ALLOY Block

Awesome exhaust by THE EXHAUST CENTRE MIDLAND


Awesome Kenne Bell Supercharger setup by AGRO! and Bluepower Racing Developments

Now with full DOT approval and Permitted for road use
superpursuit83 is offline   Reply With Quote Multi-Quote with this Post
Old 22-03-2006, 12:09 AM   #4
Redrum
Force Fed Fords
 
Redrum's Avatar
 
Join Date: Nov 2005
Location: Victoria
Posts: 5,556
Default

Thanks SuperPursuit, thats the thread I was thinking of!!
__________________
2021 Focus ST-3 Mountune Enhanced
Redrum is offline   Reply With Quote Multi-Quote with this Post
Old 22-03-2006, 12:23 AM   #5
chief
FTF Club Moderator
 
chief's Avatar
 
Join Date: Jan 2005
Location: Driving my Tickford T3 Wagon in Sydney
Posts: 3,132
Default

An underdrive pulley also throws out the balance on your engine. Ford will not cover warrenty if you have one of these fitted.
__________________
Albert Einstein:
Es ist schwieriger, eine vorgefaßte Meinung zu zertrümmern als ein Atom.
(It is more difficult to alter a preconception than split an atom)

Falcon Tickford FPV (FTF) Car Club of NSW


Fords in the Park 2010


I use and recommend Stingray Car Security.
http://www.stingraycar.com.au/
chief is offline   Reply With Quote Multi-Quote with this Post
Old 22-03-2006, 07:37 PM   #6
ratter
FF.Com.Au Hardcore
 
ratter's Avatar
 
Join Date: Feb 2005
Location: Pit Lane
Posts: 11,867
Valued Contributor: For members whose non technical contributions are worthy of recognition. - Issue reason: Shares his in-depth tuning knowledge with the forum, very helpful. Contributor: For members who make a contribution worthy of recognition. - Issue reason: For his indepth tutorial on adding borders to photographs 
Default

Quote:
Originally Posted by chief
An underdrive pulley also throws out the balance on your engine. Ford will not cover warrenty if you have one of these fitted.
Balance is not the problem, ford are claiming harmonics are a problem, byt no solid proof has been presented.
__________________
Pit Lane Performance
20 Rosella St Frankston 03 9783 8122

Authorised Streetfighter, Pcmtec , SCT & HP Tuners Tuning Agent,
ratter is offline   Reply With Quote Multi-Quote with this Post
Old 22-03-2006, 07:47 PM   #7
BA_BOSS
Regular Member
 
BA_BOSS's Avatar
 
Join Date: Dec 2005
Posts: 206
Default

Quote:
Originally Posted by superpursuit83
Underdrives basicaly let more power go to wheels, Less weight to spin etc. Thats how I understand it anyway.

John
UDP’s change the pully ratios by x%. By putting a smaller pully on the crank and larger pulleys on the water pump and alternator , the crank requires less effort to spin them therefore the engine will spin up quicker and a bit more snot to the driving wheels.

Effect is much like what the gear box does, 1st gear will accelerate the car quicker than 2nd gear and so on.
BA_BOSS is offline   Reply With Quote Multi-Quote with this Post
Old 22-03-2006, 08:56 PM   #8
Rollin
Banned
 
Rollin's Avatar
 
Join Date: Jan 2005
Location: Smoking the bags in a Turbo 6-speed ED!
Posts: 1,208
Default

isnt the pulley and the harmonic balancer two pieces on the windsor? or do you have BA?

if you leave the balancer alone and just replace the pulley, i see no reason for there to be problems with harmonics, and even if you replace the whole thing, it may not make that much of a difference anyway - lots of people (esp with chevs i think) put steel balancers on their V8s and dont seem to have any dramas, though they are making a shedload of HP.
Rollin is offline   Reply With Quote Multi-Quote with this Post
Old 22-03-2006, 09:09 PM   #9
pertuan
Focus on my Focus
 
Join Date: Dec 2005
Location: Canberra
Posts: 820
Default

How much more power to the wheels would you gain from replacing the pulley? Is it a notable difference? I personally didnt think it would make THAT much of a difference.
__________________
Now: 2006 Ford Focus LX Manual in Satin White
Wife: 2013 Kuga Titanium in Frozen White
Then: 1990 Ford Laser - Assasinated by a 76 year old man who failed to give way.

Now normally when we have these races, Jeremy goes in the car and says "Powerrr" alot.... - James speaking about Jeremy (Top Gear S7 E05)

American parts... Russian parts... ALL MADE IN TAIWAN! - Russian guy in Armegeddon
pertuan is offline   Reply With Quote Multi-Quote with this Post
Old 22-03-2006, 09:25 PM   #10
chief
FTF Club Moderator
 
chief's Avatar
 
Join Date: Jan 2005
Location: Driving my Tickford T3 Wagon in Sydney
Posts: 3,132
Default

Quote:
Originally Posted by ratter
Balance is not the problem, ford are claiming harmonics are a problem, but no solid proof has been presented.

Sorry then I will clarify an underdrive pulley also throws out the harmonics on your engine. Ford will not cover warrenty if you have one of these fitted.
__________________
Albert Einstein:
Es ist schwieriger, eine vorgefaßte Meinung zu zertrümmern als ein Atom.
(It is more difficult to alter a preconception than split an atom)

Falcon Tickford FPV (FTF) Car Club of NSW


Fords in the Park 2010


I use and recommend Stingray Car Security.
http://www.stingraycar.com.au/
chief is offline   Reply With Quote Multi-Quote with this Post
Old 22-03-2006, 09:34 PM   #11
chief
FTF Club Moderator
 
chief's Avatar
 
Join Date: Jan 2005
Location: Driving my Tickford T3 Wagon in Sydney
Posts: 3,132
Default

Quote:
Originally Posted by ratter
Balance is not the problem, ford are claiming harmonics are a problem, byt no solid proof has been presented.

Sorry I will rephrase: An underdrive pulley also throws out the harmonics on your engine. Ford will not cover warrenty if you have one of these fitted.
__________________
Albert Einstein:
Es ist schwieriger, eine vorgefaßte Meinung zu zertrümmern als ein Atom.
(It is more difficult to alter a preconception than split an atom)

Falcon Tickford FPV (FTF) Car Club of NSW


Fords in the Park 2010


I use and recommend Stingray Car Security.
http://www.stingraycar.com.au/
chief is offline   Reply With Quote Multi-Quote with this Post
Old 22-03-2006, 09:50 PM   #12
X ORSMXR
missing the panther
 
X ORSMXR's Avatar
 
Join Date: Jan 2005
Posts: 1,464
Default

Mate can only go by experience if choosing a under drive l would go with powerbond under drive as have not heard of any dramas with them but heard and experienced plenty with the BPT under drives...
X ORSMXR is offline   Reply With Quote Multi-Quote with this Post
Reply


Forum Jump


All times are GMT +11. The time now is 06:49 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Other than what is legally copyrighted by the respective owners, this site is copyright www.fordforums.com.au
Positive SSL